If you’re using Edge Rails and mongrel you might have seen this error:

   1  warning: already initialized constant OPTIONS

There’s a bug report here that explains this problem in detail.

The solution for me was to rerun the freeze command:

   1  rake rails:freeze:edge

You might also get “warning: already initialized constant OPTIONS ” error if you haven’t installed a gem your software relies on. In the following example openssl should be installed:

   1  /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require’: no such file to load—openssl (MissingSourceFile)

ActiveResource might also be the problem:

   1  gem install activeresource --source http://gems.rubyonrails.org